I have dissolved polygons together to make feature A. Some of the polygons are contiguous and some are not. Therefore, there is a unique row for each feature (singlepart to multipart).

In ArcGIS or SAS how are the features assigned a unique ID?

Is the largest feature given the first ID?

  • I don't think it's safe to make any assumption of order in assignment. – Vince Jun 10 '16 at 23:15

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